>I'm just exploring some of VFP's foundation classes. I ran across this:
>
>

>In app.h is this:
>#DEFINE ERROR_IN_ERROR_METHOD_LOC    "Error in error handler"
>

>As far as I can find it's only used in one place in _error class.
>
>What's the point of defining something in an include file that only gets used once?

Also, you can define any constant which you currently use, perhaps, only once - or even not at all! - with the idea of, perhaps, having more instances later.

For instance, when I needed constants for printer codes (bold on, bold off, etc.), while browsing through the Epson manual, I defined some constants which I don't currently use, but which I might use later.